/Engine/Source/Runtime/WebBrowser/Public/IWebBrowserSingleton.h
Unregister a custom scheme handler factory. The factory may still be used by existing open browser windows, but will no longer be provided for new ones.
bool UnregisterSchemeHandlerFactory ( [IWebBrowserSchemeHandlerFactory](API\Runtime\WebBrowser\IWebBrowserSchemeHandlerFactory) * WebBrowserSchemeHandlerFactory )